897007221 has 48 divisors (see below), whose sum is σ = 1437089472. Its totient is φ = 534643200.

The previous prime is 897007217. The next prime is 897007229. The reversal of 897007221 is 122700798.

It is not a de Polignac number, because 897007221 - 2² = 897007217 is a prime.

It is a super-2 number, since 2×897007221² = 1609243909052285682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897007229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2024626 + ... + 2025068.

It is an arithmetic number, because the mean of its divisors is an integer number (29939364).

Almost surely, 2^897007221 is an apocalyptic number.

It is an amenable number.

897007221 is a deficient number, since it is larger than the sum of its proper divisors (540082251).

897007221 is a wasteful number, since it uses less digits than its factorization.

897007221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754 (or 751 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 897007221 is about 29950.0788145875. The cubic root of 897007221 is about 964.4180123431.

The spelling of 897007221 in words is "eight hundred ninety-seven million, seven thousand, two hundred twenty-one".